生物炼制
木质素
化学
亲核细胞
萃取(化学)
单糖
有机化学
原材料
催化作用
作者
Yuhan Lou,Xinyue Sun,Yanyan Yu,Suqing Zeng,Yilin Li,Yongzhuang Liu,Haipeng Yu
出处
期刊:Research
[AAAS00]
日期:2023-01-01
卷期号:6: 0069-0069
被引量:28
标识
DOI:10.34133/research.0069
摘要
Protolignin extraction can facilitate structure elucidation and valorization of lignin in biorefinery, but is rather challenging due to the complex chemical bonds present. Here, we developed the in situ generated NH3-reline (IGNR) system to realize one-pot protolignin extraction from lignocellulose. In the IGNR system, reline consisting of choline chloride and urea acted as both a solvent and a nucleophile generator, and the nucleophilic addition-elimination mechanism was verified by model compound studies. The in situ generated NH3 could precisely cleave the lignin-carbohydrate esters in lignocellulose with a near-quantitative retention of carbohydrates. The extracted IGNR-Protolignin exhibited native lignin substructure with high molecular weight and high β-O-4' content (41.5 per 100 aromatic units). In addition, the up-scaled kilogram reaction demonstrated the feasibility of the IGNR system for potential industrial application in a green and sustainable pathway. This work represents a breakthrough toward protolignin extraction in practice with the future goal of achieving total biorefinery.
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